Search found 130 matches

by AC9YY
12 Nov 2022, 23:16
Forum: General Information
Topic: Assembled 8 band 80-10 (tr) uSDX
Replies: 6
Views: 594

Re: Assembled 8 band 80-10 (tr) uSDX

(tr)uSDX is a 5 band transceiver.
by AC9YY
05 Nov 2022, 14:23
Forum: Troubleshooting
Topic: Very bad receiving
Replies: 3
Views: 248

Re: Very bad receiving

The charge pump on the display can add quite a bit of internal RF noise.
by AC9YY
31 Oct 2022, 21:31
Forum: Troubleshooting
Topic: TX power issue & missing serial number
Replies: 4
Views: 218

Re: TX power issue & missing serial number

How are you testing power output? The best way is in CW mode into a dummy load.
by AC9YY
31 Oct 2022, 20:13
Forum: General Information
Topic: A question about displaying call sign or truSDX
Replies: 5
Views: 383

Re: A question about displaying call sign or truSDX

Thank you very much for your reply. I got S1 and S8 in the wrong order. My machine is not connected to the antenna at - 101 DBM, that is, S4. How to adjust it to reach your S2-S3? Thank you. Did you do the display mod, most likely source of noise I can think of. On 20 meters on one of my units I re...
by AC9YY
31 Oct 2022, 10:58
Forum: General Information
Topic: A question about displaying call sign or truSDX
Replies: 5
Views: 383

Re: A question about displaying call sign or truSDX

S8 is -79 dBm. https://hamwaves.com/decibel/en/
S2-3 on meter connected to a dummy load.
by AC9YY
25 Oct 2022, 17:58
Forum: General Information
Topic: Larger OLED
Replies: 1
Views: 294

Re: Larger OLED

by AC9YY
13 Oct 2022, 16:04
Forum: General Information
Topic: Classical and High Bands Boards now Available for sale !
Replies: 32
Views: 3430

Re: Classical and High Bands Boards now Available for sale !

AC9YY wrote: 26 Aug 2022, 13:58 I ordered one of each board and am looking forward to the additional band options.
Still waiting on the Classical board, must be because they are backordered.
by AC9YY
22 Sep 2022, 10:53
Forum: Troubleshooting
Topic: Hi Bands board problem
Replies: 19
Views: 1131

Re: Hi Bands board problem

When selecting LogMag in the app it displays for S11 and S21 together, no other option. With the NanoVNA I can select LogMag for S21 which shows the same data as one of the graphs on the app.
by AC9YY
21 Sep 2022, 18:03
Forum: Troubleshooting
Topic: Hi Bands board problem
Replies: 19
Views: 1131

Re: Hi Bands board problem

Has anyone else tried tuning coils via the NanaoVNA yet for 10 meters?
by AC9YY
21 Sep 2022, 00:36
Forum: Troubleshooting
Topic: Hi Bands board problem
Replies: 19
Views: 1131

Re: Hi Bands board problem

Manuel, You are correct, I thought I changed the display to LogMag, but did not. The below display is where I left off at 3 windings. The first dip is at 37.7 MHz and the second at 53.8 MHz. It really appears I may have to remove another winding, but not sure why. The windings are spread out as much...
by AC9YY
19 Sep 2022, 19:57
Forum: Troubleshooting
Topic: Hi Bands board problem
Replies: 19
Views: 1131

Re: Hi Bands board problem

Another update, I have tweaked all the toroids and have achieved just under 5 watts on all bands with about 55% efficiency on all bands, but still no receive on 10M. I can hear band activity on all bands but 10M is dead. It's pretty simple actually, two coils plus one relay per band, it's kinda har...
by AC9YY
19 Sep 2022, 17:53
Forum: Troubleshooting
Topic: Hi Bands board problem
Replies: 19
Views: 1131

Re: Hi Bands board problem

I recently got the hi board too and only installed the 10 meter coils and T1 and T2. I can transmit with a bit above 5 watts around 28.9 MHz, lower frequencies are a little less. I tried receiving on my OCFD which work great with my other 2 (tr)uSDX on the lo bands as built but I get no signals. Whe...
by AC9YY
26 Aug 2022, 13:58
Forum: General Information
Topic: Classical and High Bands Boards now Available for sale !
Replies: 32
Views: 3430

Re: Classical and High Bands Boards now Available for sale !

I ordered one of each board and am looking forward to the additional band options.
by AC9YY
25 Aug 2022, 19:17
Forum: General Information
Topic: (tr)uSDX - Alternative Band Setups available
Replies: 90
Views: 16345

Re: (tr)uSDX - Alternative Band Setups available

BrumasterM01 wrote: 25 Aug 2022, 15:19 W8IJN,

Perhaps that day has arrived.
https://www.aliexpress.com/item/3256804 ... 18020TzSwZ

73
KA6VPJ
That link worked, thanks, I ordered one of each board!

73
AC9YY
Jim
by AC9YY
15 Aug 2022, 15:15
Forum: Troubleshooting
Topic: Display off
Replies: 17
Views: 932

Re: Display off

Start around 9:20 in this video. https://dl2man.de/2-trusdx-assembly/
by AC9YY
14 Aug 2022, 15:58
Forum: General Information
Topic: Temperature of case
Replies: 15
Views: 1030

Re: Temperature of case

Check for the OLED jumper.
by AC9YY
12 Aug 2022, 19:35
Forum: Troubleshooting
Topic: Display off
Replies: 17
Views: 932

Re: Display off

I think you are on the right track, firmware or bootloader corruption.
by AC9YY
12 Aug 2022, 19:33
Forum: Troubleshooting
Topic: (tr)uSDX power, efficiency and filter optimisation
Replies: 176
Views: 28562

Re: (tr)uSDX power, efficiency and filter optimisation

yo2mke wrote: 12 Aug 2022, 18:45
AC9YY wrote: 12 Aug 2022, 16:52 What band/frequency were you testing?
20m 14Mhz
Yes, that curve is not right. Is it connected correctly and are you sure you are on 20 meters?
by AC9YY
12 Aug 2022, 16:54
Forum: Troubleshooting
Topic: Display off
Replies: 17
Views: 932

Re: Display off

I was measuring with an ammeter the absorption of the radio in reception, about 80 mA, and after a few interruptions of contacts, I kept the test leads between the battery and the power cable, the display turned off. The radio turns on but the display remains off. What could have happened, it is no...
by AC9YY
12 Aug 2022, 16:52
Forum: Troubleshooting
Topic: (tr)uSDX power, efficiency and filter optimisation
Replies: 176
Views: 28562

Re: (tr)uSDX power, efficiency and filter optimisation

What band/frequency were you testing?
by AC9YY
04 Aug 2022, 15:55
Forum: Troubleshooting
Topic: Careless error, help diagnosing after frying it?
Replies: 21
Views: 1316

Re: Careless error, help diagnosing after frying it?

Does the power look fine, but meter just reads wrong? If so, look for the thread where a couple of resistors were added, 1 M ohm I think.
by AC9YY
25 Jul 2022, 21:05
Forum: Troubleshooting
Topic: Careless error, help diagnosing after frying it?
Replies: 21
Views: 1316

Re: Careless error, help diagnosing after frying it?

Check C2 and C4 on the mainboard at a minimum.
by AC9YY
24 Jul 2022, 21:15
Forum: Troubleshooting
Topic: Ever changing serial number
Replies: 4
Views: 348

Re: Ever changing serial number

I had a serial number that kept changing and it was the result of a bad bootloader installation. I ended up having to use a USBasp programmer to get the firmware loaded correctly.
by AC9YY
13 Jul 2022, 17:41
Forum: General Information
Topic: Question about IF Signal
Replies: 14
Views: 880

Re: Question about IF Signal

dl6sez wrote: 13 Jul 2022, 17:14 Have you heard about a very magic thing which can propably record analog signals in two channels?

Just think about what you could use for such a purpose....

My 2 Cents

73 de Chris
You mean like a stereo audio card? :D
by AC9YY
06 Jul 2022, 13:17
Forum: Troubleshooting
Topic: Transmits all modes except CW.
Replies: 15
Views: 1097

Re: Transmits all modes except CW.

Do you hear a tone in CW when you press the PTT button? On my unit I do hear a tone if I push PTT in CW mode. Check with the vendor of the unit, they may be able to assist you with this issue.